The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2024
Filed:
Mar. 13, 2024
Southwest Petroleum University, Chengdu, CN;
Yu Peng, Chengdu, CN;
Jiandu Ye, Chengdu, CN;
Yongming Li, Chengdu, CN;
Pengfei Chen, Chengdu, CN;
Pengjun Shi, Chengdu, CN;
Southwest Petroleum University, Chengdu, CN;
Abstract
The present invention discloses a plant-based self-degradable gel diverting agent and a preparation method therefor. The preparation method comprises the following steps: adjusting a pH of a formaldehyde solution, adding urea in three batches, heating and stirring, adding furfural in the process of adding a second batch of urea until a plant-based urea-formaldehyde resin is obtained through the reaction, completely dissolving starch in water, uniformly stirring to obtain a gelatinized starch solution, adding the plant-based urea-formaldehyde resin, adding a curing agent, and uniformly stirring, mixing and curing to obtain a product. The resin plugging agent is a liquid homogeneous system and has a low initial viscosity; the system is particle-free, can enter tiny slits; and the gel temporary plugging agent does not need to be added with a gel breaker at a temperature of 100-180° C., the temporary plugging agent can be completely degraded.